Search for ${\Lambda }_c^{+}\to p{K}^{+}{\pi }^{-}$ and $D_s^{+}\to K^{+}{K}^{+}{\pi }^{-}$ Using Genetic Programming Event Selection

Abstract

We apply a genetic programming technique to search for the double Cabibbo suppressed decays ${\Lambda }_c^{+}\to p{K}^{+}{\pi }^{-}$ and $D_s^{+}\to K^{+}{K}^{+}{\pi }^{-}$. We normalize these decays to their Cabibbo favored partners and find $\text{BR}($Λ_c^+ \to p K^+ π^-$)/\text{BR}($Λ_c^+ \to p K^- π^+$)=(0.05\pm 0.26\pm 0.02)$ and $\text{BR}($D_s^+ \to K^+ K^+ π^-$)/\text{BR}($D_s^+ \to K^+ K^- π^+$)=(0.52\pm 0.17\pm 0.11)$ where the first errors are statistical and the second are systematic. Expressed as 90% confidence levels (CL), we find $<0.46$ and $<0.78$ respectively. This is the first successful use of genetic programming in a high energy physics data analysis.

10 pages

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• Cerenkov Particle Identification in FOCUS
• The Target Silicon Detector for the FOCUS Spectrometer
• Reconstruction of Vees, Kinks, ${\Xi }^{-}$'s, and ${\Omega }^{-}$'s in the Focus Spectrometer
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Cited by in corpus (7)

• A Profile Likelihood Analysis of the Constrained MSSM with Genetic Algorithms
• First Observation of Doubly Cabibbo-Suppressed Decay of a Charmed Baryon: ${\Lambda }_c^{+}\to p{K}^{+}{\pi }^{-}$
• Hadronic D and D_s Meson Decays
• Observation of the Doubly Cabibbo-Suppressed Decay $D_s^{+}\to K^{+}{K}^{+}{\pi }^{-}$
• Construction of a Kinematic Variable Sensitive to the Mass of the Standard Model Higgs Boson in H->WW*->l l nu nu-bar using Symbolic Regression
• Application of Gene Expression Programming in Improving the Event Selection of the Semi-leptonic Top Quark Pair Process
• Study of the doubly Cabibbo-suppressed decays $D_s^{+}\to K^{+}{K}^{+}{\pi }^{-}$ and $D_s^{+}\to K^{+}{K}^{+}{\pi }^{-}{\pi }^0$